Truss.



(I. KAHN & T. H. KANE.

TRUSS.

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WITNESS/5S:

TRUSS.

Specification of Letters Patent.

Patented June 23, 1914.

Application filed April 24, 1913. Serial No. 763,240.

To a?? u-zom4 it muy concern.'

Be it known that we, Jmts KAHN, a citizen of the United States, residing at Detroit. in the county of 'ayne and State of Michigan. and THOMAS H. KANE, a citizen of the United States, residing at Youngstown. in the county of Mahoning and State of Ohio, have invented a new and useful Truss. of which the following is a specification.

This invention relates to builtI up girders for architectural and engineering purposes and its object is to provide a truss which shall have great strength, and which can be easily and quickly producedw' This invention consistsv of a truss embodying main longitudinal members or chords each having pairs of lianges. of flanged diagonal or web members extending between the chords and having portions of the flanges lying between the flanges of the chords. the flanges of the chords being bent inwardly to lock the diagonal members in position.

It further consists in forming vthe diagonals from a continuous bar, I-shaped in cross section. and having its opposite flanges engaged by the flanges of the chords.

In the accompanying drawings Figures 1 and 3 are elevations of trusses embodying this invention. Fig. 2 is a cross section on line 2&2 of Fig. 1. F ig. 4 is an end view of a tension member. Fig. 5 is an end view of a web member. Fig. 6 is a lsect-ion on the line 6`6 of Fig. 3."

Similar reference characters refer to like parts throughout the several views.

The principles embodied in the construc tion shown in Figs. 1 and 2 are those vof wel] known bridge trusses. The main longitudinal members 1 and 2 constitute the complession and tension members of a truss. while the diagonal members 3 and vertical member l have the duty usually performed by the web members of a truss. that is. transmitting tension and compression stresses from one main'longitudinal member to the other as such stresses arise.

The main compression member 1 (Figs. 1 and 2) has a groove in which a wooden floor sleeper 6 may be laid, and is further provided with flanges 7. that may supportrlbbed metal lath 8. over which. and between the sleepers 6. concrete 9 may be spread. The main tension member 2 (Figs. 1 and 2) .lower chord 2 members 1 and 2, respectively. 1When the diagonals are in place, the Hanges 20 and 21 are forced toward each other, gripping the adjacent flanges 26 between them, and forming shoulders 2T and 28 on each side of these anges where they leave these chords. The other flange 26 is, in each case, 29 to engage over the, inwardly bent [langes of the main members, best shown 1n Fig. 6. This absolutelv' ment is liableyto occur whenever the grip of the flanges 20 and 21 alone is relied upon. The Hanges 26 of the diagonal membersmay be folded back Hat with the webs at 30 when such diagonal members cross each other, and any desirable means may be used to secure them together, rivets 31 being shown.

It is preferable in some cases to use the Warren type of truss. which is shown in Fig. 3. The upper and lower chords shown thereln are of the same cross-section as is the shown in Fig. 1. and the diagonal 3 is secured to each of the chords in the manner previously described. The end of the vertical portion 4.- is secured to the end of the lower chord by means of a crimp 32 and shoulder 33 that correspond to the crimp 39 and shoulder 23 heretofore described. -Metal lath 8 and 16 may be supported upon the laterally turned flanges 15, and may carry concrete 9 and plaster 17 as previously indicated.

The sizes and proportions of the various parts may all be changed by engineers without departing from the spirit of our in vention.

We claim.

1. In a truss, the. combination of two main longitudinal members each having two parallel flanges. a bar comprising a" web and a plurality of laterally extending tianges bent to form diagonals of the truss with-one of 20 and 21 on the its lflanges lying between the flanges of one of the main members, and another of its flanges bent down onto portions of the main member to hold the bar and main member together.

In a truss, the combination of two main members each having two parallel flanges, a bar, comprising a web and a pair of laterally extending flanges, bent to form diagonals of the truss with one of its flanges lying between the flanges of one of the main members, one of which is bent down onto said flange on the bar, which in turn is bent down into close engagement with the bent flange of the main member.

S. In a truss, the combination of a main member, and a member inclined in respect thereto, said main member and said inclined member each having a plurality of flanges, one flange of the inclined memberolying between two of the flanges of the main member, one of' said flanges of the main member being bent to grip the said flange of the inclined member and to form shoulders on each side of the flange, and another of the flanges of the inclined member being bent to closely engage the bent flange of the main member to prevent relative movement of the main and inclined members in any direction.

4. I'n a truss,`the combination of al1 upper compression member having a pair of parallel downwardly projecting flanges` a lower tension member having a pair of parallel upwardly projecting flanges', and diagonals between the compression and tension members comprising webs and laterally extending flanges fitting between the parallel flanges on the compression and tension members, said parallel flanges being bent toward each other and flanges of the diagonalsbeing bent over adjacent portions of the parallel flanges to hold the diagonals in position. v

In a truss, the combination of flanged and centrally'grooved compression and tension members, and a flanged continuous bar bent to form the diagonals of a truss, flanges of the compression and tension members being bentto grip two of the flanges of the bar and to form shoulders on each side of the. flanges where the bar leaves the main members and two other flanges 0f the bar being bent to engage adjacent flanges of the tension and colnpression members, to prevent longitudinal movement of the bar.

t3. In a truss, the combination of parallel flanged compression and tension members and an I beam bent to alternately engage the compression and tension members and to form the diagonal members of a truss, the flanges ot' the compression and tension members beingy bent down to grip the upper and lower flanges of the I beam, respectively, and the flanges of the I beam being bent down over the edges of the flanges on the longitudinal members to lock them in position.

7. In a truss, the combination of flanged compression and tension chords and lattice members having a plurality of longitudinal flanges, the flanges of the chords being bent against flanges of the lattice members and other flanges of the lattice members being bent against'the bent flanges of the chords to lock-the members of the truss together.

S. In a truss, the combination of compression and tension chords and lattice members, portions of chords of the lattice members and portions of the lat-tice members being bent over portionsof the chords to form rigid connections between them.

9. In a truss, the combination of'main chord members consisting of vertically flanged plates, flanged lattice members eX- tending between the chord members, the flanges of the chord members being bent to `grip the 'lattice members and the flanges of the lattice members being bent to engage the bent. flanges of the chord members to lock the members together.

10. In a metal structure, the combination of a plurality of flanged-members lying in the same plane and meeting at an angle, the

flanges of one of said members being bentl over flanges of the other member, and other flanges of the second member being bent over the bent flanges of the first member to lock the. members together.'

11. In a metal structure, the combination being bent over portions v of a plurality of flanged members lying in the same plane and meeting at an angle, the flanges of said members being` bent to lock the members together without. reducing their cross-sectional area.

In testimony whereof we have signed this specification in the presence of two subscribing` witnesses.

JULIU S KAHN. THOMAS HENRY KANE.V

lYitnesses:

MERLE SMITH, BLANCHE IVADDELL. 

